2.An act of emptying, as of the bowels
3.To discharge or excrete from the body.
4.To discharge(body waste, for example); void.
5.To excrete waste from the bladder or bowels.
7.of or relating to the process of excretion.
8.To cause(the bowels) to evacuate.
9.Relief valve must be piped to a suitable drain.
10.To evacuate. Used of the bowels.